So happy this adapter works with my old keyboard that I use a lot with piano students.

I have an older Yamaha keyboard and although the AC/DC specs were different after a bit of research I settled on this one and it has worked great.

Arrived on time over the holidays and works perfect!

works perfect, just as described and arrived in record time, couldn't be happier, don't know what else to say ...

works grate

Good buy, works excellent, strongly recommended, very good price for the quality

I got the item very quickly and it is in perfect working condition.

so this is works great for me

I have no problems with this product, works perfect and even if the cord is kind of short, my outlet is right near the keyboard.

I will say, if you're considering buying this for an NP11, you may want to rethink it - if you don't plan on playing all the time, or if you'll be moving the piano around a lot, the batteries work really well and add barely any weight to the NP11, and you may as well save the money.